George a



gleiten tets atrntt @fitr-t.`

GEORGE A. COLTON, OIF ADRIAN, MICHIGAN.

Laim Patent No. 60,695, daad January 1,1867.

IMPROVED BURGLAR ALARM.

Gila Schaub nient tu in this tnica ntint mit netting putt nt tip amc.

TO ALL WHOM II MAY CONGERN:

Beit known that I, GEORGE A. COLTON, of Adrian, in the ccunty ofLenawee, and State of Michigan, have invented a new and improved BurglarAlarm; and I do hereby declare that the following is a full, clear, andexact description thereof', which will enable others skilled in the artto make and use the same, reference being had to the accompanyingdrawings, forming part of this specification.

The present invention relates to a novel and simple attachment to beapplied to the doors of dwelling-houses or other buildings, whichattachment is of such a construction and arrangement oi` parts, that,when the'door is opened, an alarm will be sounded, thus warning theoccupants of the same of the approach and attempted entrance byburglars.

In the accompanying plate of drawings, my improved burglar alarm isillustrated- Figure 1 being a side elevation of the same, showing it asapplied to'a door; and

I Figure 2, a front viewr Similar letters of reference indicate likeparts.

A, in the drawings, represents the frame of the burglar alarm embracedin the` present invention, which is attached to a bed-plate, B,- havingsecured to one of its ends a cup-shaped-bell, C; I), the hammer, forstriking the hell, which, through it stem, E, is attached to tlcspindle, F, turning in suitable bearings of the frame A audits bed-plateB. This spindle, F, carries an anchor-pallet, G, such as is employed inthe escapement of watches, clocks, and other similar movements, whichpallet, by its hook-shaped ends, H, engages with the teeth, a, of aratchet-wheel, I. This ratchet-wheel, I, is secured to a spindle orarbor, J, which is. surrounded by'a coiled spring, K, in a similarmanner to that used in clock movements, so as to operate, as it uncoils,to revolve theI said ratchet-wheel, and thus, through the anchor-palletG, rock its spindle F forward and backward, which in its turn throws thebell-hammer alternately against and away from the bell, whereby the saidbe'll is caused to be sounded or struck with a force in directproportion to that of the coil or .operating spring, K; the saidratchet-wheel being secured to its spindle in any suitable manner toallow such spindle, by means of a proper key, to be turned, and thus itscoiled spring wound up and around the stime, without moving theratchet-wheel, while at the same time, as the spring unwinds or uncoils,the ratchet-wheel and spindle will turn in common with each other. Tohold the pallet G against the teeth of the ratchet-wheel and thusprevent it from turning, a set-screw, L, of a spring-bar, M, attached atone end to the frame A, but loose at its other end, is arranged to bearVagainst it where it is held, by conning the loose end of such spring inand between the jam of the doorframe and the door, if the alarm is to beused in connection with a door; the frame A, for securing it to a door,being provided with a hook or claw-arm, N, of suitable shape, that bydriving it into the door it will firmly hold the alarm to and upon thesame.

From the above description, it is plain to be understood land readilyapparent, that, if the door to which the alarm is secured asexplained,be opened, the loose en'd of the spring M will be set free, andconsequently the holding-screw L released from the anchor-pallet, when,as is obvious, the alarm-bell will be immediately and repeatedlysounded, providing its operating'coiled spring has been first properlyand sufficiently wound up therefor. In lieu of securing the burglaralarm to'a door, as hereinabove explained, it may be hung and xed totheinside knob of the same, for which purpose a hook, O, is hung to oneend of the bed-plate C of the alarm, that, by means of a set-screw, P,at its hook-end, can be secured to the spindle of a door-knob, so thatas it is turned it will turn with it, and thus cause the inner end ofsuch hook to be disengaged from the holding spring M, for theanchor-pallet suiiiciently to leave and set such pallet free, to rock bythe operation or the uncoiliug of the coiled spring K, which causes thehammer to sound the alarm, as has been hercinbefore particularlyexplained. Q, a catch hung to bed-plate in suitable position to hold theset-screw, by the bent spring, M, against the anchor-pallet, G, orescapement ci' the ratchet-wheel, I.

I claim as new, and desire to secure by Letters Patent- The arrangementof the spring M, with its stop L, in combination with the escapement orpallet G, substantially as and for the purpose described.

I also claim the hook O, or its equivalent, in combination with theabove, substantially as described and for the purpose specied.

GEO. A. COLTON.

Witnesses:

Jos. Evnnrss, Guss. A. Daw.

